Low and medium density (LD & MD) STM32 microcontrollers have single 7 channel DMA unit while high density (HD) devices have two DMA controllers with 12 independent channels. DMA do automated memory to memory data transfers as well as peripheral to memory and peripheral to peripheral.
如上就是HAL_UART_Transmit_DMA 函数全部的代码。 除去些初始化的代码，可以提炼到比较重要的代码如下 设置memory 到 periphery 的地址，并且开启中断 并使能DMA通道
UART - Universal Asynchronous Receiver/Transmitter (serial communication). In this example 2000 bytes will be transfered using DMA, Transmit Half Complete and Transmit Complete interrupts achieving the best performance.
The STM32F730x8 devices are based on the high-performance Arm® Cortex®-M7 32-bit RISC core operating at up to 216 MHz frequency. • Four USARTs plus four UARTs • An USB OTG full-speed and a USB OTG high-speed with full-speed capability (with the. ULPI only for the LQFP64 and...
LPC2148 Tutorials. STM32 Tutorials. Linux. Programming. ESP32 has three Serial ports. UART0, UART1 and UART2.. This function is used to configure the UART pin in ESP32. Using this function we can select any pin as a TX, RX, CTS and RTS.
I'm trying to add some temperature sensor to my STM32-based computer water-cooling controller. You know, a common solution to this is to use some thermistor and try to use some ADC(Analog-Digital-Converter) to capture the voltage on that. Using UART+DMA to implement the 1-Wire Protocol.
Sep 12, 2017 · You can measure the overhead of the UART interrupts by comparing the byte transmission period to the width of the ‘ISR’ pulse. For STM32F410RB the overhead is 12 out of 96 microseconds (12.5%) regardless of the buffer size: In order to reduce the interrupt-related overhead, we will show switch UART to use DMA (direct memory access).